Copyright © ITmedia, Inc. All Rights Reserved.
There are two main types of smoke alarm tech, says Raman Chagger, principal consultant at BRE, the Building Research Establishment. Ionisation-based systems use a tiny amount of radioactive material to charge, or ionise, particles in the air which flow between two small plates. Should smoke interrupt that flow of charged particles, the alarm goes off.
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Save StorySave this story
Гангстер одним ударом расправился с туристом в Таиланде и попал на видео18:08